Boot and shoe edge burnishing machine



.H. D. STONE. Boot and Shoe Edge Burnis'hing Machine,

No. 223,772. Pat gented Jan. 20, I880, Jgi F slm Wde ITLI/ (1w N.FETERSf PHOTO-LITHOGRAFHEII, WASHKNGTON n c UNITED STATES PATENT OFFICE.

HENRIE 1). STONE, OF BOSTON, MASsAoHosETTS.

BOOT ANDSHOE EDGE B URNISHING MACHINE.

SPECIFICATION formingpartof Letters Patent No. 223,772, dated January 20, 1880.

To all whom it may concern Be it known that 1, HENRIE D. SToNE, of Boston, in the county of Suffolk and State of Massachusetts, have invented certain Improvements in Boot and Shoe Edge Burnishing Machines, of which the following is a specification.

This invention relates to that class of boot and shoe edge burnishin g machines in which a reciprocating burnishing-tool is employed and the boot or shoe is held in the hands of the operator and pressed against the burnishing-tool.

The invention has for its object, first, to enable the boot or shoe to be more easily held by the operator than heretofore whenthe burnish ing-tool is operating on the abrupt curves of the toe and causing the boot or shoe to jump away from the tool, rendering it difficult to keep the boot or shoe in place; secondly, to enable the same tool to be employed, if desired, for burnishing the edge of the shank and the edge of the sole; thirdly, to provide improved means for supporting and permitting the partial rotation of the burnishing-tool on an axis at right angles to its operating face and for holding the tool with a laterally-yieldin g pressare in its normal position.

To these ends the invention consists in the improvements which I will now proceed to describe and claim. 4

()f the accompanying drawings, forming a part of this specification, Figure 1 represents a front view of a machine embodying my improvements. Fig. 2 represents a vertical section of the same on line .0; 00, Fig. 1. Fig. 3 represents a horizontal section of the same on line 3 3 Fig. 1. Fig. 4 represents a perspective View of the tool-holder removed from the machine.

Similar letters of referen ce indicate like parts in all the figures.

In the drawings, A represents a suitable fixedframe supporting the working parts, here inafter described. Said frame is provided with suitable g'iiides B B to hold and permit the reciprocating motion of a cross-l1ead,(), and a shaft, D, rotated by suitable means at a high rate of speed, and provided on its end with a cam or eccentric, E, which reciprocates the cross-head. F represents a tool-holder, which is connected by a hinge-joint to-thecross-head Application filed October 13, 1879.

C, so as to be capable of swinging or partially rotatinghorizontall y. Said hingejomt is preferably composed of perforated lugs I I and J, formed on the tool'holder and cross-head, and a pin or pivot. K, passing through said lugs, as shown in Fig. 2.

The cross-head O is provided with vertical guides or flanges L L, the inner surfaces of which are segments of a circle whose centeris the pivot K. The toolholder is so formed that its edges M M will fit somewhat snugly against the segmental guides L L, so that said edges will always be uniformly supported by the guides, as shown in full and dotted lines in Fig. 3.

N N represent spiral springs interposed between the tool-holder and cross-head, one on each side of the hinge-joint. permit the free swinging motion of the toolholder and keep the same in a normal position when it-is not turned by the pressure of the article being burnished. The lower portion of the tool-holder is cut away to form a seat, 0, for the tool-shank P and two shoulders, R R, to bear against the edges of said shank and supportit horizontally. The shank P iscnrved at its upper portion, so that the burnishingtool P at its lower end is substantially in line with the bin ge-joint connecting the tool-holder and the cross-head. The shank P is detachably connected to the tool-holder by a set-screw, S, or other suitable means. The tool P is of any suitable form and material, and it is preferabl y provided with a slight lip, a, sufficiently wide to burnish a very narrow strip on the bottom of the sole without affording any considerable bearing for the same. The tool P is also preferably formed with a face, b, for burnishin g the edge and bottom of the shanks of shoes, &c.

T represents an adjustable gage or bearing, which'is supported by the frame A, and is located in such relation to the tool 1? that it forms a. stationary rest or hearing for the bot tom of the sole of a boot or shoe while the edge thereof is being burnished by the tool. The

gage T is formed'on a square shank, U, which slides in a square orifice in the frame A and terminates in a threaded bolt, V. A nut, W, is located on the bolt V, and is prevented from moving longitudinally thereon by suitable These springs stops X X, so that the rotation. of said nut causes the bolt V, shank U, and gage T to move in or out to change the position of they gage with reference to the tool.

Operation The cross-head being reciprocated at the rate of, say five thousand or six thousand strokes per minute, the operator takes a boot or shoe, places the bottom of the sole against the gage T, which is properly adjusted, and subjects the edge to the tool P, moving the sole along over the gage as the work progresses. When the tool reaches the toe portion it has a tendency to shake or throw off the boot or shoe. To overcome this tendency the operator presses the sole firmly against the gage T, and the friction thus produced enables him to keep the boot or shoe under control, so that the toe can be burnished with much less difliculty than heretofore. The gage also enables the beveled shank-edge to be burnished by the same tool that burnishes the sole-edge, the bottom of the shank being supported by the gage while the beveled edge of the shank is held against the burnishing-tool, as shown in dotted lines in Fig. 2. The means described for connecting the shank P to the tool-holder enable the tool to be securely attached and supported and readily applied and removed. The segmental guides of the cross-head afford firm bearin gs for the edges of the tool-holder, whatever may be the position of the latter,

and the springs keep the tool in a normal position, so that the operator is not obliged to adjust it at the commencement of the operation.

I claim-- 1. In an edge-burnishing machine, the gage or rest T, having a screw-threaded shank and a thumb-nut thereon, adapted to be adjusted substantially as and for the purpose described.

2. As a means for supporting and reciprocating a burnishing-tool,-tbe sliding cross-head 0, having the segmental guides or flanges, and the tool-holder hinged to the cross-head and adapted to partially rotate and bear against said guides.

3. The cross-head provided with the curved guides or flanges, in combination with a vertical centrally-pivoted tool-holder made laterally adjustable by means of supportin g-sprin gs, substantially as shown and described.

4. The tool-holder F, having the recess 0 and shoulders 1%, adapted to receive the shank of a burnishing-tool, substantially as shown and described.

In testimony whereof I have signed my name to this specification in the presenceof two subscribing witnesses this 9th day of October, 1879.

HENRIE D. STONE.

Witnesses:

A. SEAVER, G. T. BROWN. 

